We've heard of cow tipping, but there are no bovine opportunities in San Francisco.
Some people in that town, however, have apparently taken to tipping Smart cars.
The Associated Press reports that police in San Francisco are looking for suspects who flipped four Smart cars.
Police said they didn't know whether the incidents were a prank or another episode in escalating tensions among some residents who blame the tech industry for rising rents and cost of living.
-- Bill Miller